Journal ArticleAn Investigation of New Brown Dwarf Spectral Binary Candidates From the Backyard Worlds: Planet 9 Citizen Science InitiativeBravo, Alexia; Schneider, Adam C; Bardalez_Gagliuffi, Daniella; Burgasser, Adam J; Meisner, Aaron M; Kirkpatrick, J Davy; Faherty, Jacqueline K; Kuchner, Marc J; Caselden, Dan; Sainio, Arttu; Hamlet, LesThe_Backyard_Worlds_Planet_9_Collaboration<title>Abstract</title> <p>We present three new brown dwarf spectral-binary candidates: CWISE J072708.09−360729.2, CWISE J103604.84−514424.4, and CWISE J134446.62−732053.9, discovered by citizen scientists through the Backyard Worlds: Planet 9 project. Follow-up near-infrared spectroscopy shows that each of these objects is poorly fit by a single near-infrared standard. We constructed binary templates and found significantly better fits, with component types of L7+T4 for CWISE J072708.09−360729.2, L7+T4 for CWISE J103604.84−514424.4, and L7+T7 for CWISE J134446.62−732053.9. However, further investigation of available spectroscopic indices for evidence of binarity and large amplitude variability suggests that CWISE J072708.09−360729.2 may instead be a strong variability candidate. Our analysis offers tentative evidence and characterization of these peculiar brown dwarf sources, emphasizing their value as promising targets for future high-resolution imaging or photometric variability studies.</p>IOP2023-11-0610533775The Astronomical Journal16662260004-6256https://doi.org/10.3847/1538-3881/acffc12009136National Science Foundation